Everything went fine! now running the latest 7.2 version coming from 6.2.3.
HP server was found migratable, and worked perfectly
Many thanks for your efforts Peter!
The only issue that I encountered was that I build it without using the config_user.json that I have created and it used a random serial, which is fine, but it didn't use the fake MAC that I had defined, but the real MAC which is also fine. It just made it harder for me to find the server after the restart, but got to it in the end
Is there a specific procedure documented somewhere when it comes to the upgrades?